How would you unit test an Android app that needs to go into sleep mode, come out, and record results?

Question

I know this seems like an odd question, but I need to :

1. grab info before sleep
2. sleep
3. do tasks
4. wake up
5. get assert results

What I have tried is to enable the sleep in the set up portion of the test, unfortunately it kills everything (which I know is supposed to happen by android's standards).

Thanks, Kelly

Answer 1

Ah ha!

OK, at least for making sure to study the state of the screen. You want to do the following:

In your emulator, go to the Settings \ Applications \ Developement area and uncheck "Stay Awake"

At this point, lock your emulator. You should see the lock screen.

Now, run your test for the wake lock.

For me I have done the following (which uses roboguice 1.1.2)

@MediumTest
public void test_And_Screen_Is_In_Sleep_It_Should_Not_Make_Screen_Bright() throws Exception
{
    //currently test hates this even after I have assigned it the proper rights
    //to quote Ted Striker: What a pisser! :)
    //_power.get().goToSleep(0);

    boolean screenOn = _power.get().isScreenOn();

    assertFalse(screenOn);

    if (!screenOn)
    {
        _wake.get();

        boolean screenOn1 = _power.get().isScreenOn();

        assertFalse(screenOn1);
    }

    if (_wake != null)
    {
        _wake.release();
    }
}

I have an interface called IWake like so:

public interface IWake
{
    void get();

    void release();
}

In the implementation for IWake I simply setup the class to do all the heavy lifting for acquiring (get()) and release( which is also release())

For force the testing device to lock, I came up with a great idea since you (typically) can't use that sleep method in the PowerManager.

Do this!

In my test method I did this for the setup:

@Override
public void setUp() throws Exception
{
    super.setUp();

    _pwr = (PowerManager) getInstrumentation().getContext().getSystemService(Context.POWER_SERVICE);

    //setup timeout which is part of: android.provider.Settings.System
    System.putInt(getInstrumentation().getContext().getContentResolver(), System.SCREEN_OFF_TIMEOUT, 0);
}

Basically I decided to change the timeout to 0 in the settings. Since this happens it locks it instantly. How freakin' cool is this? :) Anyways, I hope this helps others

Cheers, Kelly